First, I'm just fixing a model that needed to be fixed. Second, I'm lazy too. So I rather not make more models. The texture of the model is low resolution and doesn't contain the things you mention. I don't want to scour the internet for more textures. This model doesn't even have a normal map and is only suited for a distant building. Prefabs are better for this purpose anyway, a mapper can change it by himself to have the variations you're mentioning. Third, if I had that time to make that I would make a stunning trainer map with my own name in massive font on the splash screen and become famous and very rich.